It's been a long time, been a long time
Been a long, lonely, lonely, lonely, lonely, lonely time
Ah, ah-ah, ah-ah
We were recording another number; we’d just finished a take and John Bonham did the drum intro and we just followed on. I started doing pretty much half of that riff you hear on Rock n Roll and it was just so exciting that we thought, "let’s just work on this". The riff and the sequence was really immediate to those 12-bar patterns that you had in those old rock songs like Little Richard, etc, and it was just so spur-of-the-moment the way that it just came together more or less out of nowhere.
It also acted as something of a "shut-up" to music critics, who questioned whether Led Zep had lost their rock band mojo after the largely acoustic, folk-inspired, and mixed-reviewed Led Zeppelin III.